Improvement in scroll-sawing machines



l. E. BROWN.

Scroll-Sawing Machine s. No.155,854, Patented 0t.l3,187 4.

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THE GRAPHIC CO. PHOT O'LITFL39I- +1 PARK FLACEJQX.

UNITED STATES PATENT OFFICE.

JAMES E. BROWN, OF XENIA, onio.

IMPROVEMENT IN SCROLL-SAWING MACHINES.

Specification forming part of Letters Patent N 0. 155,854, dated October13, 1874; application filed April 21, 1874.

To all whom it may concern:

Be it known that I, JAMES E. BROWN, of Xenia, in the county of Greeneand State of Ohio, have invented anlmprovement in Scroll- SawingMachines for sawing out the twisted parts of stair-railings; and I dohereby declare that the following is a full and exact descriptionthereof, reference being had to the accompanying drawings making part ofthis specification Figure 1 being a side elevation of the machine; Fig.2, a top view of the same; Fig. 3, a top View of the adjusting bed-plateon which the saw-table is mounted; Fig. 4, a vertical section of theadjustable elevating rest for the rail-piece to be sawed; Figs. 5 and 6,views of other parts detached.

Like letters designate corresponding parts in all of thefigures.

The nature of my invention consists in the several devices hereindescribed for holding the pieces of wood to be sawed, and for adj ustingthem in position, to vary the size and form of the twisted portions ofrails to be produced therefrom.

Let A represent the bed-frame on which the machine is mounted; a, thebed-plate on which the saw-table b is mounted, by means of asupporting-standard, c. In the plate a there are slots, (shown in Fig.3,) through which pass set-screws, which serve to fasten the said platesecurely to a projecting flange on the bed-frame A. By means of theseslots and set-screws, the saw-table b is held adjusted to a greater orless distance from the saws e e, the adjustment being effected by ascrew, f, turning in a nut of the plate a, and a holdingsocket, 9, Fig.1, of the bed-frame. The supporting standard 0 is, at its upper end,fitted centrally in a collar, d, on the under side of the saw-table b,and centrally down through the table and standard; and through thebedplate a a hole is formed, through which a bolt, snugly fittingtherein, is inserted and held by a nut, securing thereby all the partstogether. On the saw'table b is located a bedplate, h, on which to mounta standard, 70, for sustaining the upper end of the piece 121., fromwhich the section of the rail is to be sawed. This bed-plate has acircular adjustment on the saw-table, being pivoted over the center ofthe table, and having concentric slots *5 i, provided with set-screwsscrewing down into the table, as shown in Fig. 2, whereby the positionof the standard It is adjusted to different lengths of pieces to besawed. The standard k is also adjusted in position on the bedplate h,nearer to or farther from the center of the saw-table b, by means of aslot, j, in the said bed-plate, with raised sides, over which the baseof the standard slides, and is held in any position to which it isadjusted by a set-screw, t. The standard It is thus adjusted to sawrail-pieces to difl'erent radiuses. This standard also has an upperportion, Z, adjustable up and down on the main part of the standard tovary the height of the upper, and of the piece to be sawed and the pitchof its inclination. The upper end of the adjustable part I is hingedthereto, and has screwholes to fasten it to the piece m, as shown mostclearly in Fig. 4, so that it will abut at any angle against the saidpiece. The lower end of the piece m is screwed to a holder, at, whichturns to any angle, vertically, on a .round holder-rod, 0, extendingradially, or nearly so, from near the periphery toward the center of thesaw-table b, to which it is fixed by suitable bearings at the end. Theholder at is adjusted upon this rod to cut a section of railof greateror less radius from the piece m, and

held by means of a set-screw, p, or its equiva-' lent.

WVith this construction, when a piece, m, has been inserted and securedin place, and adjusted to the proper inclination and radius, the tableb, on which it is mounted, is caused gradually to turn on its center, byany suitable and well-known means, to feed the piece to the two saws, e0, while in motion, and the two side surfaces of the piece are therebyshaped. A portion of the table b is cut away, as shown at s, Fig. 2, toallow the table to be fed by the saws. The table b must be adjusted toproduce the proper radius of the rail by adjusting its standard 0 uponthe bed-plate a, above described. A table, 1, and saws 2 2 are employedfor cutting the rail-pieces to the proper thickness, and shaping theirupper and lower surfaces after their circular sides are shaped, as abovedescribed. On the table 1 is a rest, 3, on which to lay the pieces,being of peculiar construction, as shown in Fig. 5, which is a top View,and in Fig. 6, which is an end View thereof. 0n the under side of therest is a pivot-pin, fitting in the top of the saw-table; and concentricwith this pivot, on which the rest turns, is a slot, 1), in which is aset-screw to secure the rest in any desired angular position on thetable. By this adjustment, the rest is adapted to any variation of thepitch of the rail-piece. The top of the rest has two parallel raisedsurfaces, as shown in Fig. 5-0ne behind and the other in front of thesawsmaking a sunken place between, in which will fit and lie securelythe rounded surface of the rail-piece, of whatever shape. In the table1, suitable holes are cut to allow the saws 2 2 to move up and down in.

JAMES E. BROWN.

In presence of THOMAS E. SCROGGY, BEN. NESBITT.

